Feed ring with drain grooves for rotating grindstone wood grinding machines



June 16, 1953 G. D. mus 2,642,231 FEED RING wm-x DRAIN GROOVES FOR ROTATING GRINDSTONE WOQD GRINDING MACHINES Y Filed Sept. 13, 1949 2 Sheets-Sheet l afforrzqys.

June 16, 1953 G. o. ILLIG 2,642,231

' FEEQ RING WITH DRAIN GROOVES FOR RQTATING GRINDSTONE WOOD GRINDING MACHINES Filed Sept. 13, 1949 2 Sheets-Sheet 2 Qfforne ys.

Patented 7 June 16, 1953 FEED RING WITH DRAIN GROOVES FOR ROTATING GRINDSTONE WOOD GRIND- ING MACHINES George/.1). Illig, Lockport, .N. Y., .assignr, by mesne assignments, to Charles B. Roberts, Lockport, N. Y.,as-trustee I Application September 13, 1949, Serial No. 115,321

' This invention relates to improvements in ma chines for grinding woodto producewoo'd pulp;

and more particularly to grinders of the type in which the wood is fed to the grindstone by means of a feed ring arranged eccentrically about the grindstone.

one or the objects of this invention is toprovide a feed ring for the woodhaving means of improved construction for facilitating the removing of ground wood fromthe machine. Another object is to provide a feed ring in which the surface of the feed ring which contacts withthe wood is provided with drain grooves through comma (01.241-38) to the grindstone.

which water carrying the ground wood may flow to the'sides of the ring fordischarge from the machine. A further object is to provide a feed ring of improved construction with diagonally extending grooves therein for receiving the water and wood pulp, and from which water carrying the ground wood will be discharged by gravity during the rotationof the feed ring; A further object is to provide a feed ring of this type in which the grooves are of substantially V-shape with the sides thereof extending rearwardly and I outwardly with reference to the direction of movement of the feed ring and terminating at the side edges of the feed ring.

Other objects and advantages will be apparent from the following description of one embodiment of the invention and the novel features will be particularly pointed out hereinafter in connection with the appended claims.

In theaccompanying drawings:

Fig. 1 is an end elevation, partly in section, of

a wood grinding machine provided with a feed ring embodying this invention.

Fig. Zis a development of a portion of the inner surface of the feed ring along section line 2-2, Fig. 1. 1

Fig. 3 is a fragmentary transverse sectional elevation of the lower part of the feedrring and the discharge troughs for the wood, the section being taken approximately on line, 3+3,

in such manner that a portion of the feed ring extends into close proximity to the grindstone 6. This arrangement results in the formation of a pocket 8 for the wood to be ground. The grinding machine also includes a suitable chute, guide feed ring may be provided with the usual teeth or projections to on the inner surface thereof which engage the wood for feeding the same The feed ring may be rotatedto feed the wood to the grindstone in any suitable or desired man' of example, the feed ring is provided on the outer surface thereof with a worm gear l2suitablysecured to the feed ring and having teeth with which a worm l4 engages, the worm being driven by means of a shaft l5 from any suitable source of power, as is well understood to those skilled in this art. The worm gear may be built in sections provided on their inner surfaces with tongues ll, see Fig. 3; which fit between a pairof outwardly extending projections 18 on the feed ring and pins or bolts I9 may be provided which extend through the flanges I! and 18 for securing the worin'gear on the outer surface of thefeed ring. Any other means for rotating the feed ring may be provided, and the rate of rotation of the feed ring may be con trolled to vary the pressure of the wood, on the grindstone to produce ground wood of the type The outer surface of the feed ring may also be provided with suitable cylindrical bearing surfaces ZlL'which cooperate with suitable bearings on which the feed ring is rotatably supported. These bearings may be of any suitable or desired form, and in the construction shown, a pair of bearing blocks 22 are provided as shown in Fig. 1 which have suitable bearing surfaces cooperating with the surfaces 29 of the feed ring. Any

or hopper 9 of any desired construction into which wood may be fed from an endof'the machine and depositedin the :pocket 8.- The other suitable means .for rotatably supporting the feed ring may be provided.

The inner surface of the feed ring is also provided-with a plurality of parallel and relativelyv shallow grooves 25 which extend slightly below the bases ofthe teeth or projections N3 of the feed-ring, these grooves cooperating with suit able blades or scrapers which remove thin'pieces,

shims or slivers of wood which adhere to the roughened or toothed portion of the inner wall I of the feed ring after passing thegrindstone.

These shims orslivers may be reground by engaging wedge-shaped blocks 26 which cause the shims or slivers to be moved into engagement with the grindstone for reducing the same to wood pulp. Any other means for r'egrinding the shims or-s'livers may, of course, be provided, if desired.

It is important in connection with a wood grinding machine to provide means for carrying away the wood pulp or wood fibers as soon as possibleafter they have been ground from the wood; logs supplied to the machine sothat these fibers will not be reground'. since theregrinding y 3 reduces the length of the fibersfand consequently; the strengthof the paper made therefrom.

I, consequently, provide means of improved construction on the inner surface of the feed ring for receiving the ground wood together with water 5,

and for carrying the ground wood to the'sides' of the feed ring where they will be discharged into the usual troughs 28 arranged at the sides of the feed ring as shown in Fig.3; For thisf purpose, I provide the inner surface of the feed ring with grooves which terminate at their outer ends If desired, the inner ends of-each pairof grooves may be-joinedat the middle portion ofathefeem ring; thus forming grooves of substantially V- shaped form asclearlyseen in' Figsaz and 3.

In the operation-of a feed ring provided-with the grooves3ll,=water supplied-by the usual spray pipe 3i washes the ground wood-from thestoneand-from any-logs adjacent thereto into the grooves 38-, and'outwardlybeyond the sides of the feedring into thetroughs 28; Water-and ground wood enteringthetgroovestll before thesame reach the lowermost portion-of travel of the feed ring .will be retainedin the grooves out of contact with the wood to be ground, As the feed ring advances from the lowermost position to the left in Fig. 1, the grooves williassumeflpositionsrin 40 which-the apexes or the inner ends of the grooves will be at higher elevations thanntheends of the grooves which terminate at the sides of the feed ring, and consequently, any :water and wood pulp which has collected in the grooves, and-whichis-received in the grooves while in positionsin advance of the lower portion of. the path of movement of the feed ring. will flow=by gravity to the .sides vof the feedring and be discharged into the troughs 28..

The construction described isdesir'able in-that I it effectually disposes .of the ground wood in such manner as to avoid Iregrinding of the same. The feed ring described "is'of efficient "and simplified" construction and enables the. parallel grooves 25 to act as feeders of the water and wood pulpto. the deeper diagonal grooves 30,-since any water carrying wood pulp will flow into the drainage grooves 36 during the rotation of the-feed ring; Furthermore, if the diagonal drainage grooves be- 7 come filled with water and pulp before they: reach the'lower part of the path of rotation of the feed ring; excess water and'wood pulp will overflowthe upper drainage grooves into the parallel grooves 25 and will in'turn .be'discharged from 1 the-parallel grooves into lower drainage grooves of the feed ring for discharge into-the troughs 28. Because. of the diagonal relation of thedrainage grooves relatively to the parallel grooves 25,-the drainage grooves will not interfere with the operation in the parallel grooves of the usual knives or scrapers for removing shims or slivers from the feed ring.

It .will be understood that various changes (in the details, materials, and arrangements-of parts -7 4 which have'been herein described and illustrated in-orderto "explain the'nature of the invention, may be made by those skilled in the art within the principle and scope of the invention, as expressed in the appended claims.

I claim 'as my invention:

l. In-awood grinding machine including a rotary grindstone, a feed ring arranged eccentrically about said grindstone with a portion of the inner surface in'close proximity to the outer surrace-er said grindstone and rotatable to feed wood against the surface of-the grindstone, means for supplying water to the portion of the grindstone contacted with the wood, teeth on the inner surface of said feed ring which engage the wood for moving the same toward said grindstoneand a plurality of shallow grooves in the inner surface of said 1 feed: ring arranged in parallel relation to: the sideedges of the feed ring and spaced from each other for cooperation with means for re'--- moving Wood adhering to portions of saidring after passing said rgrindstone, that improvement which-includes a plurality of drainage groovesin the inner surface of said feed ring and deepen: than said first mentioned grooves and extending in angular relation thereto, and which receive water and ground wood and which terminate at the outer edges of said ring for discharging; ground wood and water therefrom,--said grooves extending from themiddle-portion of said'ringto the edge portions thereof.

solid betweenthe inner andouter peripheral surfaces thereof and has-on-its innerperipheral face a plurality of relativel shallow ope'n-faced channels extending into the inner face 'of said'feed' ring and extending generally crosswise with re:

spect to said feed ringand opening through'the ends of said ring, said channels 'extendingr'in depth below thebaseof the teeth and across the teeth and intersecting-saidteeth; and a'spray device within said ring at the side of said stone toward which the teeth on the ring move 'inthe rotation of-the ring, for deliveringa-liquidwo saidstone to release fibers from said stone and" from the wood which is being ground, and hushthe same into said channels for movement toward opposite endsof said ring for discharge from said r ng at said=ends thereof,- saidchannels running from approx imately midlength of the ring to the ends of the ring and having their outer ends trailmg with respect to "the direction of rotation of said ring.

GEORGE D. ILLIG.

References Cited-in the file of thispate'nt UNITED STATES PATENTS Number Name Date 147,429- Phillippy et a1 Feb. 10 1874 303,125 Corcoran Aug. 5 1-884- 589,248 Coward Aug. 31 1897 782,196 Grifiin Feb. '1" 1905'- 2,187,763 Ullgren Jan? 23: 1940 2,282,887 Roberts 1 May 12 1942" 2,406,904 Roberts nuance-. sept. 31 1946 

